Hertfordshire · Grease filter exchange
Grease Filter Exchange in North Mymms
Specialist grease filter exchange for North Mymms: diagnosis first, then a fixed quote, the work and a report with photos. Call for a fixed quote.
- Filters that leave gaps in the canopy
- Gaps where filters have been removed
- Grease dripping from the canopy
About our grease filter exchange in North Mymms
Across North Mymms, our filter exchange suits restaurants, pubs, cafés, schools, care homes and other kitchens, whether there’s one canopy or many. We can come before or after service so nobody has to stop cooking. Common call-outs are for smoke and heat lingering under the hood and hand-washed filters that still look greasy, on school and hospital kitchens, restaurants and pubs and baffle filters.
Work in a small place like North Mymms starts with a call to agree access and timings, and the clean itself is the same full TR19® job as in any town: canopy, filters, duct, fan and discharge, with a certificate and photo report at the end.
The sign-off is always in writing: a dated report with pictures of the work, and for TR19® Grease cleans, a certificate issued through the BESCA VHE portal. It shows what was done and what, if anything, couldn’t be reached.
- Place
- North Mymms (AL9)
- Wider area
- Hertfordshire
- Records
- Photo report after every visit
- Price
- A fixed price before work begins
- When we work
- When your site is closed, plus a 24/7 line
- Phone
- 0345 646 2711
- Reviewed
- 30 October 2026
How the visit works
Before we leave, we walk the area with whoever is on site. Anything we couldn’t reach or that needs attention is pointed out there and then, and it goes on the report too. All told, the work takes a few minutes per canopy, longer for a large kitchen with several canopies. Photos of the system and how to reach it help us plan a visit to North Mymms.
- We look at the canopies and the condition of the filters.
- Any damaged or missing filters are noted.
- Greasy filters are swapped for clean ones.
- We check the filters are seated and the canopy is ready to use.
- Anything that needs attention, such as a greasy plenum, is pointed out.
Getting ready for the visit
- Agree a time when the area can be out of use
- Tell us about access, such as roof hatches, plant rooms, ceilings or locked areas
- Plan for cooking equipment or plant to be off before we arrive
Ask for a quote
Here’s what helps us quote: where the site is, what it is and its opening hours, a few pictures and the last certificate or report, if there is one. Once you have those, phone us on 0345 646 2711, or send details by email.
Advice
Questions from North Mymms
Who enforces fire safety at workplaces in North Mymms?
That’s Hertfordshire Fire and Rescue Service. If a fire safety officer visits a commercial kitchen, they may ask about the fire risk assessment and how the extract is kept clean.
Will you come out to North Mymms?
Yes, North Mymms is part of our area, however small the site. A survey first, from pictures or a visit, means we arrive with the right kit.
What if parts of the system can’t be reached?
They’re listed in the report, never skipped quietly. You’ll know exactly which parts weren’t reached and why, and we can quote to improve the access.
Which sectors do you work in?
Commercial premises of every kind: from restaurants, pubs and hotels to schools, hospitals, care homes, offices, shops and food production sites. Work is timed around how each site runs.
Which records should we keep?
Visit reports, certificates and your in-house cleaning logs. They’re what an insurer, fire officer or EHO may ask for, so keep them where they can be found quickly.
Do you handle baffle and mesh filters?
Both baffle filters and mesh filters are covered. We record the sizes and number of filters at the start so every set we bring fits.
How do you protect the area?
We start with protection: sheeting over floors, worktops and anything close to the work. We tidy up and take our waste away before we leave.
Where do the greasy filters go?
Yes. The dirty filters are taken away for cleaning and the clean set stays in the canopy.
Part by part
The plenum
The plenum is the space behind the filters. It collects whatever grease the filters miss.
Mesh filters
Mesh filters use layers of metal mesh to trap grease. They clog quickly in a busy kitchen, so they need changing often.
Staff cleaning versus specialist work
For ventilation and air handling systems, in-house care is mostly about checks: clear grilles, a log of filter changes and reporting anything odd. The inside of ducts and units needs a specialist.
Keep a record of what your team does. A dated log of in-house cleaning and checks shows an inspector that the system is looked after between visits, alongside our reports.
Also near North Mymms
Also in North Mymms
Leave it or put it right?
Leaving filters too long pushes more grease into the plenum and ducts. That makes the next full clean a bigger job and grease readings can rise between cleans. Equipment tucked in a roof space or outbuilding near North Mymms rarely gets looked at unless someone books it.
Leaving it longer rarely makes the work cheaper. Problems in a system tend to grow, and a neglected system can mean more work. If you’re unsure, call us on 0345 646 2711 or use the quote form and we will give you an honest view and a fixed quote.
Why book with us
- Work around your opening hours, with 24/7 emergency cover
- Fully insured
- Ventilation hygiene specialists since 2009
- A BESCA Vent Hygiene Elite member, cleaning to BESA TR19® Grease
Take a look at what affects the cost or our accreditations and certificates.
North Mymms kitchens: local notes
The FSA’s food hygiene register shows about 15 restaurants, cafés and works canteens and about 5 takeaways and sandwich shops within 1.5 miles or so of the middle of North Mymms. Each canopy among them has filters that load with grease and need swapping or cleaning. Food hygiene inspections in North Mymms are the job of Welwyn Hatfield council’s environmental health team. A greasy canopy or dripping filters are the sort of thing an inspection can pick up. A dated certificate in the maintenance file answers the question before it’s asked. North Mymms sits within the area of Hertfordshire Fire and Rescue Service. The Fire Safety Order puts the duty on whoever runs a kitchen to control its fire risk, and a greasy duct is fuel.
Commuter trade near Brookmans Park station can mean long cooking hours, and long hours put a kitchen into BESA’s more frequent cleaning bands. If you run catering at a healthcare site, such as a hospital like Shenley Hospital about 3.5 miles south-west, the extract may need cleaning more often than a part-time kitchen.
North Mymms is about 2 miles north-west of Potters Bar, in Hertfordshire. Across the AL9 area, we cover grease filter exchange for commercial sites. North Mymms is one of 381 places in Hertfordshire where we work for commercial clients. There’s also a page for London, about 16 miles away.
We cover every part of AL9 for grease filter exchange and the roads nearby. Whether your site is on St Mary's Church Road, Abdale Lane and Warrengate Road or a nearby road, our technicians can take on the work. We also cover the places around North Mymms: Welham Green (1 mile north), Colney Heath (2 miles north-west), Sleapshyde (3 miles north-west), Hatfield (3 miles north) and Shenleybury (3 miles west). Larger places within reach include Watford (9 miles south-west), Hemel Hempstead (11 miles west), Stevenage (13 miles north), St Albans (5 miles north-west), Welwyn Garden City (6 miles north) and Harpenden (9 miles north-west).
What’s near North Mymms
In North Mymms, that means kitchens and buildings near Chancellor's School, North Mimms Park and The Old Maypole Public House, among other places. The closest station to North Mymms is Brookmans Park station, roughly 0.7 miles east. Other landmarks nearby include Shenley Hospital (3.5 miles south-west) and Potters Bar Museum (2 miles south-east). Not far away are Furzefield Wood and Lower Halfpenny.
Managing agents and facilities teams in North Mymms
Multi-site operators often want one contractor and one number. We cover South East England and London, so a run of sites can go into one programme and kept to a regular schedule.
Facilities teams in offices, schools and healthcare sites book us too in North Mymms and across Hertfordshire. Work can be phased by floor, building or site to keep disruption down.
Common problems we fix in North Mymms
Hand-washed filters often come back still greasy. Grease lodges deep in baffles and mesh, and a quick rinse leaves it there.
If you notice any of these, it’s worth a diagnosis:
- Grease collecting in the filter channels
- Drips falling from the filters onto equipment
- Filters that come out of the sink still dirty
- Filters that leave gaps in the canopy
If you look after a school kitchen, at a school such as Brookmans Park Primary School or anywhere near North Mymms, the holidays are the usual time for a TR19® clean.
What your quote should include
- What’s included in the scope, part by part
- How areas they can’t reach will be recorded
- How VAT is shown on the quote
- What insurance they carry
Honest limits
It’s worth knowing the limits before booking:
- Grease behind the filters that a swap can’t remove
- Grease deep in the extract system
- Cooking smells reaching neighbours, which need odour control
Not sure which it is? You can call us on 0345 646 2711 or drop us a line and we’ll tell you honestly.
Parts of the system we cover
- Restaurants and pubs
- Mesh filters
- Wall canopies
- Island canopies
- School and hospital kitchens
- Baffle filters